New York AGRICULTURAL EXPERIMENT STATION. 353 
tive fertility of different portions of the field, or, in other words, 
the fallacy of using small plats and generalizing on the evidence 
of data so obtained. 
_As above noted, each plat was harvested in five equal portions, 
hence we have fifteen series of five duplicates each, of one- 
thirtieth of an acre extending across the field. The duplicates 
have been fertilized alike, and treated alike in all other respects, 
except, that when the field was hoed across from north to south, 
some one or two days intervened between the hoeing of the first 
and last of the five. That difference in treatment may have some 
influence on the crop, but it can not account for the differences . 
of yield, especially when it is further noted, that cultivation strips 
of one acre each, under the same treatment, failed to show any 
differences worthy of note. 
Following are tables showing the yields from these BUD ata 
on each plat in detail : 
45 
